International Journal of Polymer Science / 2015 / Article / Tab 2

Research Article

Synthesis of Chitosan Oligomers/Propolis/Silver Nanoparticles Composite Systems and Study of Their Activity against Diplodia seriata

Table 2

Assignment of FTIR spectra bands.

ChitosanChitosan oligomersPropolisChitosan/propolisChitosan/propolis/silver NPsAssignation

3290328532853300υ(OH) overlapped to υs(N–H) [35, 36]

29702972C–H bands of aromatic compounds

29302929υas(C–H) in –CH2 [35]

286728732873υs(C–H) in –CH3 [35]

164616491640
1598
1707υ(–C=O) of the amide group CONHR in chitosan [36, 38] and υ(–C=O) of flavonoids and lipids, found in propolis [39]/aromatic ring deformations [39]

156815541560υ(–C=O) protonated amide group [35]
δ(NH3) protonated amine group

1417141914041409δ(OH) [40]

1372137513771373δ(–CH3) [41]

133413411333Typical propolis C–O and C–OH vibrations [39]

13181317υs(–CH3) tertiary amide [35]
ω(–CH2) + OH in-plane deformation

1284
1228
1260υ(C–O–H) [35]

1152114811501160υas(CO) in oxygen bridge resulting from deacetylation of chitosan

11361133Alkenes bands from propolis (coumaroyl glycerol) [42]

10601081107810661084υ(CO) of the ring C–O–H, C–O–C and CH2CO [35, 39]

1038
989
1042
986
Bands from propolis

920923922Bands from propolis

892892872ω(C–H) of the saccharide structure [35]

836835Band from propolis

646
617
656
615
Typical bands from binary and ternary formulations

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